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hichkok12 [17]
3 years ago
8

Allen and his lab partner each held a tuning fork, frequency 440 Hz, in their hands. Allen tapped his tuning fork with a mallet

and they listened to the sound it made. "Wait a minute!" exclaimed Allen's partner. "My tuning fork is vibrating too!" Sure enough, both tuning forks were vibrating although only Allen hit his with the mallet. How can you explain this? A) Sound waves are transferred to the tuning fork. B) Sound particles caused the second tuning fork to vibrate. C) Sound energy travelled as waves from one tuning fork to the other. D) Sound energy travelled as particles from one tuning fork to the other.
Biology
2 answers:
Studentka2010 [4]3 years ago
8 0

Answer:

C

Explanation:

Gre4nikov [31]3 years ago
8 0

Answer:D

Explanation: resonance

The natural frequency of the second tuning fork is the same as Carl's; the were both 440 Hz. When the waves from Anderson's tuning fork reached his partner's, the second tuning resonated; it started to vibrate as well.

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3. Match the body cavities that have to be opened during the listed surgical procedures listed below. Note that more than one ch
Leviafan [203]

Answer:

Match the body cavities that have to be opened during the listed surgical procedures listed below. Note that more than one choice may apply. (a) thoracic (b) vertebral (c) abdominopelvic (d) pericardial (e) pleural (f) cranial  Liver operation C AND ATriple bypass heart surgery  

A Stomach stapling A Removal of a section of lung or lobe A Manual pressure release of a brain tumor  FAppendix removal  D Gastric bypass surgery

Explanation:

The letters with the corresponding cavities in capital letters were assigned adjacent to the area to be performed.

All the named surgeries present different zones and present different planimetries.

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3 years ago
Below is a mature eukaryotic mRNA transcript. Translate this mRNA into a protein, also showing the tRNA anticodons involved. Mak
diamong [38]

Answer:

mRNA ⇒ 5'GMU  UAC  <u>AUG  </u>CGG  CUC  AGU  <u>UGA  </u>GGC  GAA  AAA  A 3'

tRNA ⇒                           UAC  GCC  GAG  UCA  ACU

protein ⇒ N - MET   ARG   LEU   SER   Stop - C

Explanation:

In protein synthesis, the ribosome reads mRNA in the 5´ to 3´ direction, and, according to the <u>codon</u>s that are being readen, tRNA transfers the correct amino acids to build the polypeptide chain. A codon is a short sequence of three nucleotides that store the genetic information for the aminoacids´ assembly. Each tRNA has two important sites. One of them that couples with the codon of the mRNA molecule, named <u>anticodon</u>. The other site couples with an amino acid. tRNA allows amino acids to align according to the nucleotidic sequence in the mRNA molecule.  

Once the new amino acid links to the growing peptidic chain, the binding between the amino acid and the tRNA molecule breaks. The tRNA is now free to join another amino acid and repeat the cycle.  

The protein is synthesized from the amino terminus to the carboxy terminus, while the added amino acids to the chain are coded by a codon formed by three bases in the mRNA. mARNs also have a start and end codon that are the signals of the synthesis initiation and finish. When the ribosome reaches the end codon, protein synthesis is over.    

Each of the codons represents one of the 20 amino acids used to build the protein. Each amino acid can be codified by more than one codon. From the total 64 codons, 61 codify amino acids, and one of them is a start codon. The left three codons are stopping translation points.

The codons indicating the initiation or stop points during the translation process are:

• The start codon AUG is the most common sequence used by eukaryotic cells and places near the 5´extreme of the molecule.  

• The end codons are UAA, UAG, UGA.

Protein synthesis initiates in the AUG start codon -Metionin-, and ends when reaching either of the stop codons UAA, UAG, UGA.

In the exposed example we have the following mRNA.

mRNA ⇒ 5'GMU  UAC  <u>AUG  </u>CGG  CUC  AGU  <u>UGA  </u>GGC  GAA  AAA  A 3'

Codons are separated by a space left between them. AUG is the start codon placed near the 5´ extreme. UGA is the end codon near the 3´ extreme. tRNA will add amino acids from the start codon, not before.

tRNA ⇒ UAC  GCC  GAG  UCA  ACU

Anticodons are separated by a space left between them.

protein ⇒ N - MET   ARG   LEU   SER   Stop - C

Each mRNA codon codifies for an amino acid. The start codon codifies for methionine. AUG = Met, CGG = Arg, CUC = Leu, AGU = Ser, UGA = Stop codon. The amino terminus is represented as an N and the carboxy terminus is a C. The first extreme to be translated carries the amino-terminal group, while the other extreme carries the carboxy-terminus group.

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Rasek [7]
<span>B. self-determination
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Answer:

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It's C , i'm 100% positive

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